Merge unnecessary split widget modules

graphics/src/widget/button.rs

@@ -4,7 +4,12 @@
 //!
 //! [`Button`]: type.Button.html
 //! [`State`]: struct.State.html
-use crate::Renderer;
+use crate::defaults::{self, Defaults};
+use crate::{Backend, Primitive, Renderer};
+use iced_native::mouse;
+use iced_native::{
+    Background, Color, Element, Layout, Point, Rectangle, Vector,
+};
 
 pub use iced_native::button::State;
 pub use iced_style::button::{Style, StyleSheet};
@@ -14,3 +19,95 @@ pub use iced_style::button::{Style, StyleSheet};
 /// This is an alias of an `iced_native` button with an `iced_wgpu::Renderer`.
 pub type Button<'a, Message, Backend> =
     iced_native::Button<'a, Message, Renderer<Backend>>;
+
+impl<B> iced_native::button::Renderer for Renderer<B>
+where
+    B: Backend,
+{
+    const DEFAULT_PADDING: u16 = 5;
+
+    type Style = Box<dyn StyleSheet>;
+
+    fn draw<Message>(
+        &mut self,
+        _defaults: &Defaults,
+        bounds: Rectangle,
+        cursor_position: Point,
+        is_disabled: bool,
+        is_pressed: bool,
+        style: &Box<dyn StyleSheet>,
+        content: &Element<'_, Message, Self>,
+        content_layout: Layout<'_>,
+    ) -> Self::Output {
+        let is_mouse_over = bounds.contains(cursor_position);
+
+        let styling = if is_disabled {
+            style.disabled()
+        } else if is_mouse_over {
+            if is_pressed {
+                style.pressed()
+            } else {
+                style.hovered()
+            }
+        } else {
+            style.active()
+        };
+
+        let (content, _) = content.draw(
+            self,
+            &Defaults {
+                text: defaults::Text {
+                    color: styling.text_color,
+                },
+            },
+            content_layout,
+            cursor_position,
+        );
+
+        (
+            if styling.background.is_some() || styling.border_width > 0 {
+                let background = Primitive::Quad {
+                    bounds,
+                    background: styling
+                        .background
+                        .unwrap_or(Background::Color(Color::TRANSPARENT)),
+                    border_radius: styling.border_radius,
+                    border_width: styling.border_width,
+                    border_color: styling.border_color,
+                };
+
+                if styling.shadow_offset == Vector::default() {
+                    Primitive::Group {
+                        primitives: vec![background, content],
+                    }
+                } else {
+                    // TODO: Implement proper shadow support
+                    let shadow = Primitive::Quad {
+                        bounds: Rectangle {
+                            x: bounds.x + styling.shadow_offset.x,
+                            y: bounds.y + styling.shadow_offset.y,
+                            ..bounds
+                        },
+                        background: Background::Color(
+                            [0.0, 0.0, 0.0, 0.5].into(),
+                        ),
+                        border_radius: styling.border_radius,
+                        border_width: 0,
+                        border_color: Color::TRANSPARENT,
+                    };
+
+                    Primitive::Group {
+                        primitives: vec![shadow, background, content],
+                    }
+                }
+            } else {
+                content
+            },
+            if is_mouse_over {
+                mouse::Interaction::Pointer
+            } else {
+                mouse::Interaction::default()
+            },
+        )
+    }
+}